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LAB seminar: Fredrik Johansson - On relational entity disambiguation

SEMINAR

We present a novel method for entity disambiguation in anonymized graphs based on local neighborhood structure.

Most existing approaches leverage node information (entity attributes), which might not be available in several contexts due to privacy concerns, or information about the sources of the data. We consider this problem in the supervised setting where we are provided only with a base graph and a set of nodes labelled as ambiguous or unambiguous. We characterize the similarity between two nodes based on their local neighborhood structure using graph kernels; and solve the resulting classification task using SVMs. We give empirical evidence on two real-world datasets, comparing our approach to a state-of-the-art method, highlighting the advantages of our approach. We show that using less information, our method is significantly better in terms of either speed or accuracy or both.

We also present extensions of two existing graphs kernels, namely, the direct product kernel and the shortest-path kernel, with significant improvements in accuracy. For the direct product kernel, our extension also provides significant computational benefits. Moreover, we design and implement the algorithms of our method to work in a distributed fashion using the GraphLab framework, ensuring high scalability.

Read more about the project here.

Date: 2013-10-17 09:00 - 10:00

Location: EDIT Room 3364, E-building, Chalmers (Johanneberg)

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